Transposing musical chart.



H. P. MILLS.

TRANSPOSING MUSICAL CHART.

APPLICATION FILED MAY I4. 1914.

1,236,339. Patented Aug.-7,1917.

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RELATIVE MAJORISIQI MAJOR BIB C SHARPS v z E d PLATS Q Q ITHEAQCIDENI'ALISH SHARDED' EHEIFH FIfGH M Q I@ Q mmm HARRY` P. MILLS OFPHILADELPHIA, PENNSYLVANIA'.

rnANsrosrNe MUSICAL CHART.

Application led May 14, 1914l Serial No. 838,551.

T 0 all whom it may concern.'

Be it known that I, HARRY P. Minis, a

citizen of the United States, residing at.

v ing an apertured casing and a slide adjustable therein having suitablemarkings representing the notes of the musical scale visible through theapertures in said casing whereby the number and names of Sharps or Hatsin any major or minor key ma be quickly and conveniently ascertained7 byproper adjustment of the slide within the casing.

With this and other objects in view, the invention consists in the novelconstruction, arrangement and combination of parts as will behereinafter specifically described,

claimed and illustrated in the accompanying drawings, in which,

'Figure 1 represents a the indicator complete,

Fig. 2 represents a front elevation of the slide removed,

Fig. 3 represents a longitudinal sectional view through the completeindicator,

Fig. 4 represents a rear elevation of the indicator,

Fig. 5 represents a slide removed, and,

Fig. 6 represents a transverse sectional view throu h the indicatortaken on the line 6--6 o Fig. 1.

Referring to the drawing in detail, wherein similar reference numeralsdesignate corresponding parts lthroughout the several" views, thenumerals 10 and 11 designate the front and rear walls, respectively, ofthe casing of the indicator which are secured in spaced relation bysuitable spacing elements 1.2 secured between the longitudinal edges ofsaid walls. The wall and spacing elements l2 of the casing arepreferably formed of a light durable metal or other material suitablefor the purpose. A. slide designated generally by the numeral 13 andformed from a sheet of material is snugly fitted within the casing andis longitudinally slidable therethrough. rIhe slide 13 is positionedwithin the casing with the front face 14 thereof adjacent to the frontwall 10 of front elevation of rear elevation of the Specication ofLetters Patent.

Patented Aug.` 7, 191'?.

the casing, and the rear face 15 thereof adjacent the rear wall 11 ofthe' casing.

The ends of the casing are preferably notched as indicated at 16 wherebythe slide 13 may be quickly and conveniently grasped by the fingers ofthe operator in operating the same. An opening 17 is formed through thefront wall 10 of the casing at the longitudinal center and adjacent thetop of the latter and' by suitable adjustment of the slide 13 any one ofthe letters 18 printed on the front face 14 of the slide is visiblethrough said opening. The words Key ofmajor are arranged suitably nearthe opening 17 to aid the operator in reading the indicator. Eightopenings 19 are formed substantially in alinement longitudinally of thecasing and adjacent the bottom thereof. The letters 26 formed adjacentthe bottom of the front face of the slide 14 and representing the notesof the musical scale are adapted to be moved into registration with theopenings 19 in the casmg to indicate the whole scale for the key forwhich the slide is adjusted with notes that are to be sharped or atted.Two rows of numbers 21 alined longitudinally of thefront face 14 of theslide are visible through an opening 22 formed approximately at thecenter of the casing. The upper row of numerals 21 is visible throughthe upper portion of the opening 22 and indicates the number of Sharps,if any, in any major key, while the lower row of numerals 21 indicatesthe number of flats, if any, in. any major key. The word Natural isarranged on the right and left of the numerals 21 and appears throughthe opening 22 when the slide 13 is moved to the key of (C) major andindicates that there are no flats or Sharps in that key. The wordsSharps and Flats are arranged laterally of and adjacent the top andbottom respectively, of the opening 22 to aid the user in reading theindicator.

Intermediate the openings 17 and 22 an opening 23 is formed through thefront wall 10 of the casing through which is visible any one of theletters 24 marked in longitudinal alinement on the front face 14 of theslide. The letters 24 visible through the opening 23 indicate therelative minors of any major key as indicated by the words Relativeminor is, marked on the front wall 10 adjacent the opening 23.

The several rows of characters 18, 24, 21 and 2G are uniformly spacedalike. The

of any sharp or Hat in any openings 19 at the bottom expose the notes ofthe diatonic scale whose tonic and signature are exposed at 17 and 22 reect1v'e1y.

The'rear Wall 11 of the casin' is formed with a plurality of openings 119,'22 and 23- eorresponding to the openings 17 19, 22 and 23 in thefront wall thereof adapted to coperate with the plurality of markings onthe rear face 15-of the slide13 to indicate to the user the number andnames minor scale as will be understood.

The markings on the front and rear faces of the slide 13 are so arrangedthat any adjustment of the slide will position the ke note of a majorscale in re istration with the opening 17 in the front ace of the casingand the corresponding key note of the relative minor in registrationwith the opening 17 in the rear face of the casing. The adjustment willalso position in'registration with the openings 22 and 22a a numeral,which will indicate the number of sharps or flats or both, if any, inthe particular key indicated by the key note visible, and willpositionfletters in registration with the openin 19 and 191 which willindicate the Whole iatonic scale of the key for which the slide isadjusted.

What I claim is:

A transposing musical chart com rising a casing including front and rearwal s, each having an opening adjacent the to ed e, an opening adjacentthe center, an a p urality of openings adjacent the bottom edge; a slidemovable longitudinally through said casing, and carrying letters nearthe said letters forming the chromatic scale and adapted to besuccessively movedinto regis-4 tratlon with the top openin in saidcasing' numerals marked on said s ide and adapted to be moved intoregistration with said central openings and so arranged as to indicatethe number of sharps or Hats, if any, in the scale indicated through thetop Opening?, said scale-indicating letters ap earing in t e front vandrear faces of the slid; bein so arranged that When one letter in icatinga major scale is moved into registration with the top opening in thefront of said casing, the letter representing the relative minor isvisible through the top opening in the rear wall of casing; andnote-designatin characters on the front and rear faces a jacent thebottom of said slide adapted to be moved into registration with theopenings adjacent the bottom of said casing for indicating the notes ofthe diatonic scales Whose tonics are exposed through the top openings'insaid casing; the p urality of letters indicating the major or minorscale on the slide adjacent the top thereof, the numerals on the' slideindicating the number of Sharps or flats, and the note designatingcharacters adjacent the bottom of the slide being uniformly spaced alikeon the slide, as and for the purpose specified.

In testimony whereof I affix my signature in presence of two Witnesses.

HARRY P. MILLS. Witnesses:

J. H. MCCULLOUGH, HAROLD M. KUNz.

